Don't override user-specified CFLAGS.
Don't override user-specified CFLAGS.

waitman/flac,Distrotech/flac,fredericgermain/flac,LordJZ/libflac,Distrotech/flac,waitman/flac,waitman/flac,fredericgermain/flac,LordJZ/libflac,LordJZ/libflac,Distrotech/flac,Distrotech/flac,waitman/flac,LordJZ/libflac,fredericgermain/flac,fredericgermain/flac,waitman/flac